Lawyers for American banker Eric Bellquist had confirmed he was the man arrested on suspicion of causing grievous bodily harm, but added he had been "wrongly implicated in this matter" and "categorically denies" the accusation. Duncan Lewis solicitors issued a statement on Twitter claiming Bellquist was not in Britain when the attack happened in May.

Mr Bellquist studied at the University of Colorado Boulder and worked for Lehman Brothers before joining Hutton Collins Partners, which owns restaurant chains including Wagamana and Byron.

According to police reports, the runner shoved the woman onto the road - an incident that could have resulted in a fatality - and continued on his run only to loop back along the same grounds 15 minutes after.